Internal combustion engine



@ct. 22; 1935. D. F. HUNT INTERNAL COMBUSTION ENGINE 3 Sheets-Sheet 1 Filed May s. 1955 Z'zvvavrae J DANIEL F. H T

Oct. 22, 1935. D. F. HUNT 2,018,306

INTERNAL COMBUSTION ENGINE I Filed May 3, 1955 3 Sheets-Sheet 2 Z'NVEN7';0R 1 DANIEL F'HUNT 147, 2. 5y

Oct. 22, 1935. D. F. HUNT INTERNAL COMBUSTION ENGINE Filed May 3, 1955 5 Sheets-Sheet 3 I? rranwe'y Patented Oct. 22, 1935 UNITED STATES PATENT OFFICE INTERNAL COMBUSTION ENGINE Daniel F. Hunt, Buffalo, N. Y.

Application May 3, 1933, Serial No. 669,157

10 Claims. (Cl. 123-16) My invention relates in general to internal combustion engines, and in particular to an internal combustion engine of the rotary type.

One of the principal objects of my invention has been to provide a rotary internal combustion engine of the two-cycle type, in which there shall be a positive suction of the incoming charge and compression thereof by the employment of a number of cylinders and pistons reciprocating in such cylinders.

Another object has been to provide an engine in which the full energy provided by the charge of gas in the expansion chamber shall be utilized.

Another object has been to provide efficient means for cooling the engine so as to remove from it the radiating heat cause-d by the burning of the gases.

Another object has been to provide for proper lubrication of the working parts and a separation and recovery of the lubricant which passes out through the exhaust port.

Moreover, my invention provides convenient and durable means for reciprocating the pistons within the cylinders of the device.

Moreover, it has been an object to provide an engine of two-cycle type in which the burned gases shall be substantially completely scavengered from the expansion chamber and accomplished in a positive manner.

Furthermore, my device is simple in design, of relatively few working parts, and capable of long life.

The above objects and advantages have been accomplished by the device shown-in the accompanying drawings, of which:

Fig. l is an end sectional elevation, taken on line I-I of Fig. 2.

Fig. 2 is an enlarged, transverse, sectional view, taken on line 22 of Fig. 1.

Fig. 3 is a fragmentary, transverse, sectional view, taken on line 33 of Fig. 1.

Fig. 4 is a reduced, fragmentary, end, sectional elevation, and is taken on line 44 of Fig. 2.

Fig. 5 is a fragmentary, reduced, front view of my engine.

Fig. 6 is an enlarged, fragmentary, transverse, sectional view of a modified form of construction.

'7 is an enlarged fragmentary, transverse, sectional View, showing one form of ignition means, taken on line 2--2 of Fig. 1.

Fig. 8 is a fragmentary, sectional View of the ignition device and is taken. on line 8-8 of 5. Fig. '7.

joined to the shaft by means of the web and re- 10 inforcing ribs. The shaft I0 is preferably provided with a hole I5 extending through its central portion, such hole terminating short of the rear end l6 thereof, whereby a solid wall I1 is provided. The hole 15 terminates at the front 16':

end l8 of the shaft.

A rear rotor supporting disc 25 is rotatably mounted near the rear end 16 of the shaft Ill and Within the supporting frame I I. A front r0- tor supporting disc 26 is rotatably carried by the 20 front end I8 of the shaft in interspaced relation with the disc 25 and each of these discs is mounted upon suitable roller bearings 21. The rotor supporting discs 25 and 26 support and rotatably carry the rotor 28 of my device which 25 will be hereinafter described.

A front supporting frame 30 is arranged at the front side of the motor and in interspaced relation with the rear supporting frame II. This supporting frame is provided with an annular 30 hub 3i within which a roller bearing 32 is mounted. The outer ring 33 of the bearing is carried by the hub 3| and the inner ring 34 of this bearing is carried upon an outwardly extending ring 35 formed at the center of the rotor 35 supporting disc 26. This rotor supporting disc is, therefore, rotatably mounted between the bearing 2'! carried by the front end 88 of the shaft l0 and the hub 3| of the supporting frame 30. The supporting frame 39 is provided with 40 a web 36 and with an annular flange 31 around the outside thereof. Radiating, reinforcing ribs 38 are carried by the web and extend from the hub 3| to the annular flange 31. An annular plate 39 secured to the hub 3! serves to close the bearing chamber and is provided in its inner periphery with suitable packing means 40 whereby the joint between it and the ring 35 is sealed against leakage of lubricant. The web 36 of the 50 supporting frame 30 is provided with a plurality of openings 45 arranged in its central portion and also with a number of elongated holes 45 near its periphery. Extending inwardly from the w disc and preferably just inside the annularly arrangedopenings 46 is an annular baffle flange 41,

' to be hereinafter described.

,54 are formed. The ring 52 is secured to the annular flange M- of the frame by any suitable means, such as the bolts 55. A front statorside plate 55 is located adjacent the front supporting frame as and is formed with an annular flange 5i and an annular flange 58. These flanges like those of the rear stator side plate '50 are held in interspaced relation by means of a number of integral, radially arranged ribs 59, whereby a plurality of air spaces 69 are provided. Near the inner periphery of the front stator side plate 55 is formed an annular baifie ring 6| 7 which overlaps the bailie ring i'i of the supporting frame as and which is in interspaced relation therewith so that they may have free relative rotation but are sufficiently close so as to battle the cooling air currents passing through packing is let into suitable recesses so that a portion of the packing is contained in each of the parts. The upper portion of the stator is slightly'eccentric with respect to the lower portion thereof and the rotor 28, as'shown in Fig. 1, thus forming expansion chambers 53 between the said rotor and inner wall'of the stator. Each of such chambers starts at the point where the eccentric portion of the stator joins the concentric portion of the rotor at the ignition side of the stator and extends to the preceding leading bar. In the inner working face of the stator there is formed a plurality of intake passageways 70. These passageways are preferably two in number and semi-circular in cross-section; 'They extend from a point where the concentric portion of the cylindrical surface of the'stator commences and extend around in the direction of rotation of the rotor a distance sufficient to insure that the'engine will get a supply of fuel during its suction stroke, as hereinafter clearly defined. The stator is provided with an intake sleeve H having an intake passageway 12 which I communicates with the intake passageways 10. 7 The carburetor (not shown) of the device is at is'formed an elongated exhaust port'M.

.section extendsaround thecircumference of the stator asuiflcient distance so as to insure that all of the exhaust gases will be expelled from the expansion chamber. An exhaust sleeve 15 having an: exhaust passageway 19 is carried by the stator and communicates withfthe exhaust passageway. Carried by a flange "formed on the sleeve is. an oil separator'lfl of any suitable construction but preferably having ,baflle plates .19, whereby the oilwhich may be entrained with thelexhaust gases willbe removed from the gases and allowed to settle in the sump of the sep- This stator is provided with 7 arator. A suitable outlet BI is formed at the bottom of the separator and the oil may be removed from thesump through this opening and conducted to any desired place, preferably back to the oil reservoir of the device, as hereinafter 5 described. A plurality of annular radiating fins 82 are formed around the outside of the stator for cooling purposes. A sheet metal jacket 83 is arranged about the stator and is in inter spaced-relation with it and extends from the 10 annular flange M of the supporting frame H to the annularflange 31 of the supporting frame 39. These annular flanges, as shown in Fig. 1, are slightly larger in diameter than the diameterof V the stator side plates 50 and st, whereby space is provided between the inner surface of the jacket and the outer ends of the spaces 54 and 50 formed in the side plates. A plurality of inwardly extending annular baifie plates 84 are carried by the jacket and are arranged in staggered 2O relation with the annular radiating 82, whereby a tortuous passageway is provided between the fins and baffle plates, as hereinafter described. j V

The rotor 28 which is rigidly secured and'car- 25 ried by the rotor supporting discs 25 and 251s mounted between and in sliding contact with the W inner faces of the annular flanges 5! and 58 of the stator side plates 5!! and. 55, respectively.

The rotor is provided with a peripheral portion 6 85 and with opposite side wall portions 86. A suitable semi-metallic packing 81 is arranged in an annular groove 88formed at each side of the rotor. One-half of each of these grooves is pref- 'erably formed in each of the walls 8901" the rotor 35 r and the other half is formed in the annular flanges 5| and 58 so that the joint between the stator side plates 50 and 55and the rotor will be sealed against leakage.

The rotor 01' my device is provided with em number of reciprocating pistons 90 which are radially arranged and mounted forreciprocation within an equal number of cylinder sleeves 9|, 92 and 93; The sleeves are slidably mounted within cylinders 94 which form an integral part of the rotor. Each of the sleeves has an outer surface which is concentric with. the outer periphery of the rotor and each is provided at its outer end with a flange 95 which extends part way over the cylinder 94, a suitable counterbore being provided for the reception of this portion of the flange, the remaining portion of the flange extending inwardly toward the center of the sleeve where a centrally arranged opening 95 is provided. The inner surface is preferably con- 55 ically formed, as shown in the drawings, and the head of each piston is also conically shaped so as to fit the surface of the inner portion of the flange. Suitable and well known packing (not shown) may be placed between thesleeve flange 0 95 and the surface of the piston head. :A proiection 91 is formed on each cylinder which fits into the opening 96 of thesleeve. A cap 98 is fitted over the inner end of each of the sleeves and formed with an opening for the passage of 5, The other.

the part99 of the piston rod I00. part II)! of the piston rod is slidably mounted in V the bearing I02 of a follower 19 3. This follower; is rotatably mounted upon the shaft I0.

' The parts 99 and Hit of the piston rod [98 are 7 preferably tubular and are connected. by means of a yoke I04. The yoke carries a laterally arranged roller pin H15 on each end ofwhich is arranged a roller H16. The follower 103 is centrally arranged on the shaft l0 and between this 75 follower :and each of the rotor supporting discs 25 and '30 islocated a cam disc I01. Each cam disc is rigidly attached or-keyed (as shown) to the stationary shaft I so that it is non-rotative.

. The cam discs are each formed in their adjacent faces with a cam groove I08. This groove is so formed that the upper portion or that portion which is opposite the eccentric portion of the stator is concentric with the shaft II]. The por- ,tion below this portion is, however, so formed that the groove approaches the center in a radial direction from each end of the concentric portion by means of which either of the pistons as they pass around over the concentric portion of E'the stator are first drawn into their respective sleeves and then forced outwardly as shown in Fig. 1. The rollers I are, of course, disposed in the grooves I08 and serve through the yoke I05'to cause the pistons to travel as just above described.

chambers until the exhaust port is reached.

Each of these bars is preferably semi-circular on its underside and is mounted within a holder I I I having a recess. of similar shape. Each of the holders is mounted within a suitable well or recess H2 which is formed as an integral part of the rotor 28. Obviously, the leading bars and holders extend to the opposite sides of the rotor and are in sliding contact with the flanges 5I and 58 of the stator side plates 50 and 56, respectively, as shown in Fig. 3. The outer engaging surface of each leading bar is made to conform to the inner peripheral surface of the stator 65. The leading bars may be held in contact with the inner periphery of the stator by any suitable means, but the centrifugal force created by the rotation of the rotor will ordinarily be sufiicient to seal the bar.

In order to facilitate the cooling of the device, the rotor is provided with a central annular wall or septum I I5. This septum extends around the interior of the rotor and terminates at the cylinders 94. Formed in the septum at a point near the outer circumference of the rotor is a plurality of elongated recesses H6. The septum is extended inwardly toward the cam discs Ill'l by means of a number of arcuate flanges III, each having two laterally extending legs H8 at its inner edge. These legs are are shaped and extend over and in close proximity to the peripheries of the cam discs and act as deflectors for the air. The cam discs where the eccentric portion of the groove is formed are made circular by outwardly extending webs H9. These webs have flange portions I20 which co-act with the laterally extending ends H8 to deflect the air.

The part 99 of each of the piston rods I00 is connected at its outer end to a tubular piston pin I2I by means of a bearing member I22, to which the outer end of the tubular part 99 of the piston rod is connected.

The front rotor supporting disc 26 is provided with a plurality of openings I23 which are separated by means of arms I24 which are inclined so as to provide vanes or fan blades. These arms are located opposite the openings 45 in the front supporting frame'30 and as the rotor is revolved they serve to draw air inthrough the openings 45 and to force it through the openings I23. This air is forced against the front cam disc I01 and is carried outwardly toward the outer periphery of the rotor and between the side wall 86 thereof and the front face of the septum H5. The arcuate flanges I I! with their laterally extending legs H8 serve to prevent the air from passing across to the opposite side of the septum. The air.

passes to the opposite side of the septum through the elongated openings I I6 formed therein and then passes inwardly between the opposite side of the septum and the opposite wall 86 of the rotor toward the shaft III. formed in the rear rotor supporting disc 26 near the bearing hub I26 thereof and the air which is forced inwardly is conducted through these openings I25 and outwardly in a radial direction on the outside of the rotor supporting disc 25 1:5;

and between it and the rear supporting frame II. The rear supporting disc is provided on its outer surface with a plurality of radiating ribs I21 which cause the air to be thrown outwardly by centrifugal action and thus stimulates 55:;

the circulation of such air through the motor. The air as it is thrown outwardly is forced into the passages 54 between the flanges 52 and 5| of the rear stator side plate 50 through which passages it is passed. The air coming from the passages 54 strikes the outer casing 83 passing between this casing and the outer periphery of the stator side plate and stator flange 56. The air is then deflected inwardly and outwardly by the alternate baffle plates 84 of the casing and the fins 82 of the stator until it reaches the opposite or front side of the device where it then passes between the casing and the outer periphery of the front stator side plate 55 and flange of the cylinder. through the plurality of spaces formed between the flanges 5? and 58 of this stator plate and is deflected outwardly through the openings 46 in the front supporting frame by means of the annular baffle rings 6I and 47. be seen that cooling airis conducted through the interior of the motor and then forced outwardly to the periphery of the cylinder where through its tortuous passage it picks up radiant heat caused by the burning gases and thus effectively 5 cools the motor.

Mounted within the outwardly extending hub 35 of the front supporting disc 26 is a drive flange I28. This flange is provided with an inwardly extending cylindrical ring I39 which is preferably 55 keyed or otherwise non-rotatably secured to the hub 35 of the disc 25. This flange provides means for taking power from the engine. It is preferably provided with a closed centrally arranged disc I3I which provides a cover for the bearing 60' 271 at that end of the device.

At some point in the cylinder near the place where the expansion chamber 68 is first formed, I provide a boss 32 in which is screwed a spark plug I33 for igniting the charge.

Referring to Figs. 7 and 8, I show one means by which the spark plug may be timed and operated. As here shown, the wall I 5 of the rear supporting frame ii is formed with a recess I35. In this recess is mounted two contact points I36 70 which are carried by arms I3! each attached to an insulated block I38. The arms are secured in place by pins I 39 which provide contact points for the wire used in the ignition system. The

block is slidably mounted within a recess I40 Openings I25 are 25;?

The air now passes inwardly 1*.

It Will thus piston rod sleeves 553. The yoke i5I is provided of ignition. The hub I26 of the rear rotor supporting disc 25 is provided with cam shaped projections MI equal in number to the'number of cylinders of the engine. Obviously, the pins I39 are connected with the spark plug I33 and with the source of current, as, for instance, a battery I78, througha suitable induction or spark coil I19.

In Fig. 6 I show a modification of my invention as well as a system of lubrication. In the construction shown in this figure the outer diameter of the complete device may be reduced somewhat since the guides I 45 of the follower I46 extend beyond the center of the follower. In this form the centrally arranged shaft I41 does not extend through the follower as in the form of Fig. 1

but terminates at the rearof the follower. The follower in this form is provided with a central boss M8 which is suitably. carried by a ball bearing I49 mounted'within the end of the stationary shaft I 27. In this form there is but one cam disc I59. The yoke I5I connectin'g'the parts I52 and I53 of the piston rod carries at one side a roller I44 which engages with the cam groove of the cam disc and operates the pistons in a manner identical with the operation of the form of Figs. 1 and 2. The cam disc IE9 is, of course, rigidly and nonrotatably' attached to the shaft I 41.

I55'whioh is rotatably sup-ported by the roller bearing I59. The shaft I41 in .this form 'as in the'other form carries the rear supporting frame I 57. The front rotor supporting disc I58 is identical with the front rotor supporting disc 26 of the other form of invention and it is provided circulation of cooling air in a manner similar to the other form above described.

In this form of my invention I show one method of lubricating the working parts of the device, but obviously other means may be employed with equal efficiency. In this form of inventionthe shaft I41 is provided with a large centrally arranged recess I6I which acts as an oil reservoir and within which is mounted an oil pump I62.

The pump comprises a casing I75 and an impeller I15. The impeller of the pump is connected to a shaft extension I63 formed on the central boss I48 ofthe follower. The impeller of the pump is, therefore, driven by the rotation of the central boss. The shaft extension and the central boss is provided with a'centrally arranged oil passageway IE4 which communicates with the reservoir 96! through the'opening III of the impelier which supplies the proper .amount. of lubricant to the bearings of the'follower for the with a central oil passageway I65 through which lubricant can pass to, the piston rod sleeve I52 and thence to the piston and its working surfaces.

.The yoke is provided with a lateral passageway I 66 whereby the bearing of the roll I44 is properly lubricated, as well as the groove of the cam disc The rear rotor supporting disc I54 is provided with a hub- The level of the lubricant in the recess I5! is shown and the tube" I61 which leads into the 2,018,306 7 V recess I6I through opening I68 comes preferably from the drain in the sump of the oil separator I8, or it may get its source of supply from any other a suitable means. The pump I62 feeds lubricant into a passageway I69 in the bottom wall of the 5 shaft I 41 and a lateral passageway I10 connects the passage I69 with the other lateral passage III to which a tube In is connected. This tube is led to any other working parts of the engine which need lubrication. It will be obvious that 10" due to centrifugal force lubricant will be thrown outwardly to the rotor and stator workingsu'rfaces.

Since my invention is of the two-cycle type, the charge is drawn into each of the cylinder sleeves, compressed and expanded,- after which 7 the burned gases are scavengered from the expansion chamber. In Fig. 1 ofthe drawings I show the piston of sleeve 90 on its intake stroke. Obviously, the intake stroke begins when the rollers I96 enter the lower eccentric portionof the cam groove. I 98 of the cam disc. The position of this portion. of the groove with relation to the intake ports I9 is preferably such that the piston starts to its inward movement withinthe sleeve 25' before the ends of the intake ports I9 are reached so as to create a slight vacuum within the sleeve which will stimulate the flow of combustible mixture in the intake ports just as soon as the opening 96 of the sleeve is uncovered by the rotor in 30 its circular movement about the stator From this point on until the center line of the piston is coincident with the vertical center line of the motor, the piston will be moved inwardly Withinthe sleeve thus drawing into the sleeve a maximum charge of fuel mixture from the carburetor attached to the flange I3. It is preferable that the inlet passageways I0 terminate at such 'a point that the opening 96 of the sleeve is covered by the stator wall before the piston has reached the vertical center line of the engine since a seal will thus be formed at the start of the compression stroke. From a point in the rotation of the rotor where the axis of the piston reaches the vertical center line of the motor to V,

substantially the point occupied by the piston carried by the sleeve 92, the piston will be moved outwardly within the sleeve thus compressing the charge. .When it reaches the position occupied by the piston of the sleeve 92 the sleeve'due to the'eccentric portion will be opened into the expansion chamber 68 formed between such sleeve and'the leading bar IIO preceding the piston being discharged. During the inlet and compression strokes of the engine, the sleeves 9|, 92 and 93 will be forced outwardly by centrifugal action and will have the outer face of the flange 95 of. each thus held in firm contact with the concentric wall of the stator, whereby leakage around the space between the stator and rotor ,will be prevented. This expansion space is, as

shown in Fig. 1, relatively small when the gas islet into it but during the rotation of the rotor this expansion chamber will be ever increasing in volumetric capacity so as. to provide for the ex scribed reaches the exhaust passage or port I4, TI

at which time the gases'will be allowed to escape through such port and the separator 18. The leading bar I l 0 which precedes the next succeeding piston seals the expansion chamber of the piston just described and after the leading bar of the piston just described has opened into the exhaust port the next succeeding leading bar will scavenger all of the burned gases from the expansion chamber preceding it. Any desired number of-pistons may be employed in my structure and for illustrative purposes I have shown three. Where three pistons are employed, it is obvious from Fig. 1 that as one expansion chamber is just about to be opened to the exhaust port 14 previously compressed gas of the next succeeding cylinder has been allowed to enter the next succeeding expansion chamber and is about to be ignited. Also at this period in the rotation of the rotor, the sleeve of the third piston is receiving a fresh charge of combustible mixture through suction produced by the inwardly traveling piston of that sleeve. There is, therefore, a constant torque produced upon the driving flange in my ,motor during its operation, as just above described. It is obvious that the follower I03, being rotatably mounted upon the shaft ID will follow the rotation of the rotor and provide suitable bearing for the parts H)! of the reciprocating piston rods I00. During the intake and compression strokes as just above described, the sleeves BI, 92, and 93 are held within the cylinders 94 by contact with the concentric inner surface of the stator. When, however, the cylinders reach the points in their rotation where the power and expansion cycle of this operation occurs, the pressure of the expanding gases will, due to the area of the flanges 95 of the sleeves, keep the sleeves pressed inwardly and seated within the cylinders 94 and thereby counteract centrifugal force which would tend to move them out against the stator wall.

These and other modifications of the details herein shown and described may be made without departing from the spirit of my invention or the scope of the appended claims, and I do not, therefore, wish to be limited to the exact embodiment herein shown and described, the form shown being merely a preferred embodiment thereof.

Having thus described my invention, what I claim is:

1. A rotary engine comprising a stator, a rotor rotatably mounted within the stator, the stator and rotor being so formed that an expansion chamber is provided between portions of their peripheries, a plurality of radially arranged cylinders carried by the rotor, a piston sleeve slidably mounted within each of the cylinders for preventing gas leakages around the space between the stator and rotor during the inlet and compression strokes of the engine and formed with an apertured head flange, a reciprocating piston mounted within each sleeve, and cam means for causing the reciprocation of the pistons in timed relation to the cycle of operation of the motor.

2. A rotary engine comprising a rotor having a concentric outer periphery, a stator surrounding and enclosing the rotor and having its inner periphery formed with a concentric portion and an eccentric portion, the eccentric portion forming, with the rotor, an expansion chamber, the rotor being formed with a plurality of radially arranged cylinders, a piston sleeve slidably mounted within each of these cylinders and formed with an apertured head flange for engagement with the concentric portion of the stator whereby gas leakages around the space between the stator and rotor during the inlet and compression strokes of the engine are prevented, the area of the sleeve head flange being such that when exposed to the expanding gases it will be kept seated within the cylinder, a reciprocating piston mounted in each sleeve, and cam means for reciprocating the pistons in timed relation with the cycle of operation of the motor.

3. Arotary engine comprising a rotor having a concentric outer periphery, a stator surrounding and enclosing the rotor and having its inner periphery formed with a concentric portion and an eccentric portion, the eccentric portion forming, with the rotor, an expansion chamber, the rotor being formed with a plurality of radially arranged cylinders, a piston sleeve slidably mounted within each of the cylinders and formed with an apertured head flange for engagement with the concentric portion of the stator whereby gas leakages around the space between the stator and rotor during the inlet and compression strokes of the engine are prevented, the area of the sleeve head flange being such that when exposed to the expanding gases it will be kept seated within the cylinder, a reciprocating piston mounted in each sleeve, a follower rotatable with the rotor, a piston rod carried by each piston and guided by the follower, a roller carried by each piston rod, and cam means engaging the rollers for reciprocating the pistons in timed relation with the cycle of operation of the motor.

4. A rotary engine comprising a centrally arranged stationary shaft, a front rotor supporting disc and a rear rotor supporting disc rotatably mounted at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried by the shaft and secured to the rear stator side plate, and afront supporting frame secured to the front stator side plate, thus providing a rigid support for the front rotor supporting disc.

5. A rotary engine comprising a centrally arranged stationary shaft, a front rotor supporting disc and a rear rotor supporting disc rotatably mounted at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried by the shaft and secured to the rear stator side plate, a front supporting frame secured to the front stator side plate, thus providing a rigid support for the front rotor supporting disc, and a jacket surrounding the stator in interspaced relation therewith, the front supporting frame, the front and rear rotor supporting discs, and the front and rear stator side plates being provided with passageways whereby air iscirculated through the motor.

6. A rotary engine comprising a centrally arranged stationary shaft, a front rotor supporting disc and a rear rotor supporting disc rotatably mounted at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried by the shaft and secured to the rear stator side plate, a front supporting frame secured to the front stator side plate and: giving rigid support to the front rotor supporting disc, a jacket surrounding the rotor in interspaced relation'th-erewith, the front supporting frame, front and rear supporting discs, and front and rearstator side platesbeing provided with passageways for passing cooling air through the,

motor, the rotor being provided with a centrally arranged septum, openings formed in the septum near the rotor, and means engageable with the inner edge of the septum for preventing air passing across from one rotor supporting disc to the other without passing through the septum openings.

'7. A rotary engine comprising a centrally arranged stationary shaft, a front rotor supporting disc and a rear rotor supporting disc rotatably mounted at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried by the shaft and secured to the rear stator side plate, afront supporting frame secured to the front stator side plate thus providing a rigid support for the front rotor supporting disc, a plurality of reciprocating pistons carried by the rotor, cam means rigidly carried by the shaft,

and means co-acting with the cam means for causing the reciprocation of the pistons in timed relation with the cycle of operation of the motor.

8. A rotary engine comprising a centrally arranged stationary shaft, a front rotor supporting disc and a rear rotor supporting disc rotatably mounted'at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried by the shaft and secured to the rear stator side plate, a front supporting frame secured to the front stator side plate and giving rigid support to the front rotor supporting disc, a plurality of reciprocating pistons carried by the rotor, cam means rigidly carried by the shaft and means co-acting with the cam means for causing the reciprocation of the pistons in timed relation with the cycle of operation of the motor, the cam means having an outer periphery concentric with the shaft, therotor being formed with an inwardly extending septum formed with openings near the rotor, and baffle means carried by the septum. and

engaging the concentric periphery of the earn means, whereby air passing through the rotor will be deflected through the openings of the septum. V

9. A rotary engine comprising a centrally 'arranged stationary shaft, a front rotor supporting disc and a rear rotor supportin disc rotatably mounted. at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates and provided. with radiating fins 1'5 on its outer surface, a rear supporting frame car'- ried by the shaft and secured to the rear stator side plate, and a front supporting frame secured to the front stator side plate, thus providinga rigid support for the front rotor supporting disc,

and a jacket surrounding the rotor in interspaced relation therewith and provided with bafile plates in staggered relation with the radiating fins of the stator, the front supporting frame, front and i rear supporting discs, and front and rear stator 25 side plates being provided with passageways whereby air is circulatedthrough the motor.

10. A rotary engine comprising a centrally ariangedstationary shaft, 2. front rotor supporting disc and a rear rotor supporting disc rotatably 30 mounted at opposite ends of the shaft, a rotor carried by said discs, front and rear stator side plates in bearing contact with the side surfaces of the rotor, a stator non-rotatably carried by the side plates, a rear supporting frame carried 35 

